A5081189161- Advanced optical system design
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Advanced Measurement and Metrology Techniques
- Electrowetting and Microfluidic Technologies
- Optical Coatings and Gratings
- Advanced MEMS and NEMS Technologies
- Additive Manufacturing and 3D Printing Technologies
- Manufacturing Process and Optimization
- Advanced Surface Polishing Techniques
- Social and Demographic Issues in Germany
- demographic modeling and climate adaptation
- Health and Medical Studies
- Advanced Multi-Objective Optimization Algorithms
- Sensor Technology and Measurement Systems
- Gas Sensing Nanomaterials and Sensors
- Particle Dynamics in Fluid Flows
- Electrohydrodynamics and Fluid Dynamics
- Nanomaterials and Printing Technologies
- Social Policy and Reform Studies
- Nanofabrication and Lithography Techniques
- Business Process Modeling and Analysis
- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Semantic Web and Ontologies
Karlsruhe Institute of Technology
2013-2024
Institut für Assistenzsysteme und Qualifizierung
2023-2024
German Institute for Economic Research
2008-2023
Institute of Automation
2022
FZI Research Center for Information Technology
1998-2009
Forschungszentrum Küste
2007-2008
Die Längsschnittstudie Sozio-oekonomisches Panel (SOEP) stellt seit einem Viertel-Jahrhundert als Teil der (inter-)nationalen Forschungsinfrastruktur jährlich Mikrodaten zur Messung biographischer Verläufe für die Grundlagenforschung und Politikberatung im Bereich Sozial-, Wirtschafts- Verhaltenswissenschaften bereit. Das SOEP ist zugleich Haushaltspanel Kohortenstudie. Der vorliegende Beitrag beschreibt den Hintergrund des SOEP, seine inhaltlichen Schwerpunkte, datentechnische Konzeption,...
Fused filament fabrication is a popular 3D printing process where layers of fusible plastic are used to build workpiece. However, the high manual maintenance needs limit its potential. Given common incidence defects in printed components, automated solutions detecting these errors while great benefit every practitioner. Current research primarily focuses on monitoring and optimizing manufacturing processes parameters or using additional sensors directly observe identify errors. there no...
Microinjection molding is a mass production method to fabricate affordable optical components. However, the intense nature of this process often results in part deformation and uneven refractive index distribution. These two factors limit precision replicated optics. In order understand influences injection on freeform devices, study, finite element (FEM) was employed investigate miniature microinjection-molded Alvarez lenses. addition, an innovative metrology setup proposed evaluate...
Die Daten des Sozio-oekeonomischen Panels (SOEP) werden seit 1984 auf Grundlage eines mit dem Befragungsinstitut Infratest abgestimmten Erhebungskonzepts jahrlich erhoben. Erfasst die zentral in Munchen bei TNS Infratest, aufbereitet und beim DIW Berlin, um dann moglichst zeitnah durch SOEP-Gruppe am Berlin an externe Nutzer weitergegeben zu werden. Das komplexe Zusammenspiel von Erhebung, Aufbereitung, Speicherung Weitergabe der SOEP-Daten wird laufend aktualisiert immer wieder jeweiligen...
3D-inkjet-printing is just beginning to take off in the optical field. Advantages of this technique include its fast and cost-efficient fabrication without tooling costs. However, there are still obstacles preventing 3D inkjet-printing from a broad usage optics, e.g., insufficient form fidelity. In article, we present formulation digital twin by enhancement an model integrating geometrical measurement data. This approach strengthens high-precision printing process fulfil precision...
We present design and manufacture of a 3D printed varifocal freeform optics. The optical refraction power can be tuned continuously by mutual rotation two helically shaped lens bodies azimuthally varying curvatures. Since no additional space for axial or lateral movement is required, optics allow highly compact Manufacturing the was conducted means high-resolution additive manufacturing process. Results tactile surface measurements are presented as well imaging through lens.
Aerosol jet printing is an alternative to inkjet printing, the currently most established fabrication technique for printed electronics, with benefits of small feature sizes, more homogeneous thickness layers, and possibility print on 3D structures. Printers are available market, in which aerosol generated outside heads, disadvantage that only continuous operation possible due long distance between atomization unit head. We report development validation a new integrated principle, ink...
This paper describes the application of a modeling approach for precise optical performance prediction free-form optics-based subsystems on demonstration model an eye implant. The simulation is enhanced by surface data measured lens parts. manufacturing parts realized two different processes: ultraprecision diamond machining and microinjection molding. Evaluation both processes conducted basis their measurement comparisons with nominal geometry. results indicate that improvements from...
Im Januar des Jahres 2008 begann die Feldarbeit der 25. Welle SOEP. Jahr 2009 werden damit etwa 2500 anonymisierte Datensatze von Personen zur Auswertung Verfugung stehen, seit 1984 ununterbrochen an 25 Befragungen in den westdeutschen SOEP-Teilstichproben A und B teilgenommen haben. wird auserdem bereits 20. Teilstichprobe C Ostdeutschland erhoben, mit nicht nur Lebenslaufe Erwachsenen im Transformationsprozess umfassend dokumentiert sind, sondern auch Entwicklung Kindern Wiedervereinigung...
We present the design of a varifocal freeform optics consisting two lens bodies each with helical-type surface structure azimuthally varying curvatures. This arrangement allows for tuning optical refraction power by means mutual rotation around axis. Thus, can be tuned continuously in defined range. The shape surfaces is formed change curvature subject to azimuthal angle α. At transition from α = 2π 0, discontinuity appears. Since this will seriously affect imaging quality, it has obscured....
This article describes an approach to the robust design of optical micromachine consisting a freeform optics, amplification linkage, and actuator. The consists monolithic integration principles minimize assembly efforts optimization functional components with respect robustness against remaining manufacturing tolerances. presented involves determination relevant tolerances arising from domains manufacturing, assembly, operation followed by sensitivity analysis objective identifying worst...
Dieser Aufsatz ist der Frage Weiterentwicklung des SOEP insgesamt gewidmet. Daher nehmen wir in einem ersten Teil eine Bestandsaufnahme Entscheidungsstrukturen zum Erhebungsprogramm (Governance) vor. Im zweiten Abschnitt beschaftigen uns mit den Inhalten SOEP-Erhebung - also dem SOEPsurvey. Danach gehen auf die Daten-Services fur wachsende Gruppe externen Forscherinnen und Forscher im In- Ausland (SOEPservice) ein. Und schlieslich diskutieren einige forschungspolitische Probleme, bei...
Tolerance analysis by means of simulation is an essential step in system integration. allows for predicting the performance a setup real manufactured parts and estimation yield with respect to evaluation figures, such as requirements, systems specification or cost demands. Currently, optical freeform optics gaining importance design. The often strongly depends on manufacturing accuracy surfaces. For this reason, tolerance fabrication crucial importance. characterization form tolerances...
Abstract The densely innervated human cornea is the only superficial tissue of body in which nerve fibres are accessible vivo by corneal confocal microscopy (CCM). Morphological parameters sub-basal plexus (SNP) derived from CCM images can potentially serve as a sensitive biomarker for early diagnosis various neurodegenerative diseases. evaluation single image with typical field view 0.16 mm 2 insufficient robust morphometric assessment. Mosaicking approaches have therefore been proposed to...
Optical freeform surfaces are gaining importance in different optical applications. A huge demand arises e.g. the fields of automotive and medical engineering. Innovative systems often need high-quality high-volume optics. Injectionmoulded polymer optics represents a cost-efficient solution. However, it has to be ensured that tight requirements with respect system's performance met by replicated To reach this goal, is not sufficient only characterise manufactured peak-to-valley or rms data...
This series presents research findings based either directly on data from the German Socio-Economic Panel Study (SOEP) or using SOEP as part of an internationally comparable set (e.g.CNEF, ECHP, LIS, LWS, CHER/PACO).SOEP is a truly multidisciplinary household panel study covering wide range social and behavioral sciences: economics, sociology, psychology, survey methodology, econometrics applied statistics, educational science, political
Efficient and reliable optical design requires knowledge of the production chain, materials used, environmental circumstances in field operation. This is realized comprehensive modelling approach consisting three steps: • Design for manufacturing, i.e. model must be adjusted to process chain. Knowledge rules required. Robust design, optimization functional with objective a compensation tolerance influences on system's performance. tolerances individual steps Reliable respect operational...
Presbyopia and cataract are increasing concerns in the aging society. Both age-related ailments go along with a loss of ability to accommodate. A new approach restoring patients' accommodate is Artificial Accommodation System which will be implanted into capsular bag replace human crystalline lens. Depending on actual need for accommodation, autonomously adapts refractive power its integrated optical element. As an active implant, subsystems have supplied electrical energy. After short...
This paper describes the approach to use measurement data enhance simulation model for designing freeform optics. Design manufacturing of optics is still challenging, since classical tolerancing procedures cannot be applied. In case spherical manufacturing, tolerances are more or less isotropic, and this relationship lost in surfaces. Hence, an accurate performance prediction manufactured made. To make modeling as possible, integration measured surface fabricated environment proposed....
Designing optical subsystems not only requires consideration of the properties components but also examination mechanical subsystem structures such as e.g., alignment or mounting structures. This is essential since most extend over three dimensions and are realized in modular setups, where mounted adjusted by means Hence, contour accuracy these crucial for therefore system's performance. The depends on both fabrication processes operational conditions subsystem. leads to our concept...